Power supply



FIG. 1 is a front, left, top perspective view of a power supply showingour new design;

FIG. 2 is a rear, right, bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is an enlarged top, front perspective view of the detailidentified in FIG. 1.

The broken lines depict portions of the power supply that form no partof the claimed design.

CLAIM The ornamental design for a power supply, as shown and described.